The RMT union's complaints relate to the transfer of Piccadilly Line control-room services to a new centre in Hammersmith.
Transport for London plans to replace a number of separate control centres with a single one from 2017.
The Rail, Maritime and Transport Union says the move will cause job losses - and that there are also issues with rates of pay and the lack of "any meaningful offer for Service Control staff for the Olympic period."
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Five teenagers have been injured - two seriously - after an unprovoked acid attack at a train station in Essex.
The Blackwall Tunnel in south-east London has re-opened this morning after a 20 hour closure that caused travel mayhem.
One of the teenagers was left so badly burnt doctors say he may lose his eyesight.